The auxiliary
precipitation structure comprises a plurality of inclined plates and a fixing frame, a stirring
machine is arranged in the center of the
machining pool, an annular water outlet groove is formed in the position, close to the outer side edge, in the
machining pool, an annular
precipitation groove is correspondingly formed below the water outlet groove, and the two opposite side walls in the
precipitation groove are the first side wall and the second side wall. The
diameter of the first side wall is larger than that of the second side wall, and clear water at the separation position of the precipitation tank flows into the water outlet tank; the fixing frame is detachably and fixedly connected with the first side wall and the second side wall, the inclined plates are sequentially connected end to end to form a ring shape and are located above the fixing frame, the included angle between each inclined plate and the horizontal plane is 55-65 degrees, a plurality of through holes are formed in each inclined plate, and the upper surfaces and the lower surfaces of the inclined plates are communicated through the through holes. The scheme is simple in structure, low in construction difficulty, short in construction period and low in cost. Impurities in water can be attached to or precipitated on the inclined plate, so that the water purification efficiency is improved, the
turbidity of the water can be reduced, and the water purification effect is good.